Gas mixer



F W. GAUL'K Filed 001,.

Patented Aug. 17, 19225.

UNIT El) FRANK W. GAULT; JR.. OF LOUISVILLE,

KENTUCKY, ASSIGNOR OF`GNE-'1IALF TO GAS MIXER.

Application filedOctober 22, 1925.Y Serial-No. 64,182.

This invention relates to improvements in mixing chambers for furnaces, heat engines and like structures.

This invention consists ot a. mixing chamber provided with a perforate diaphragm and having the gas andcompressedair delivered tothe mixing chamber at one side of the diaphragm whereby the compressed air will draw and carry the' gas therewith through the opening in the diaphragm and deliver itto the burnerV and burner nozzle connected to the mixing chamber on the opposite side ofthe diphragm.

The invention consists of certain novel features ot' construction and-.combination of parts which will be hereinafter .described and pointed out in the claims.

In the accompanying drawings:

Figure 1 is a view in side elevation Aot the invention Figure2 is a view in :vert-ical section;

Figure 3 isa top plan view in detail orf the diaphragm shownv in Figure 2;

Figure 4 is a detail view in topplan of a modified form of diaphragm; and

Figure 5y is a section on line 5-5 of Figure 4.

The mixing chamber consists ottwo secf tions, a lower section 10 and an upper section 11, the upper section carrying a loosely mounted fine l2 having internal serovthreads for engaging screw-threads 13.011 the exterior portion ot the lower-section 10 for connecting the two sections together. linterposed between the two sections is'ametallic diaphragm 14. This diaphragm is provided with` an opening- 15 through the centerthereof and the walls of the edge of the opening are bentvdownwardly into theA lower section 10 and provided with radial `slots orslits 16 radiating from the opening 15, throughout thedownwardly extending portion or lips 17.

The lower section 10 is providedwitha central screw-threadedopening 18 in which is received a compressed air nozzle 19, which is provided with external screw-threads for engaging the internal screw-threads of the opening- 18 so that the nozzle may be adjusted vertically with respect to the opening 15 of the diaphragm. A nut lock 20 is applied to the screwthreads of the nozzle 19 and adapted to engage lower edge of section 10 for holdingthe nozzle 19 in adjusted positon- '.,llhe nozzle 1971s provided at its lower end witlrinternal screw-threads 21 for en-l gagement with the pipe 22 leading to the compressedair supply. The side walls ot' lower section 10 are providedwith openings torthe reception of pipes 23, `23 for the de livery of gas to the mixing chamber.

, A nipple 24is provided with external screv.-threads 25 and has screw-threadedenn gagement with a tubular extension 26 formed onthe upper section 11. This nipple is ca. pable of beingadjustedwithin the mixing chamber of section 11. so that it may be moved from and toward the diaphragm and is held in adjusted position'by means of a lock nut 27 mounted on the nipple and engaging the upperend of the-tubular` exten# sion 26. Connected tothe upper endet the nipple 24 by means of screw-threads `28 is a burner nozzle 29. rlhe burner nozzle in this instance 'being provided with a shell 30 which hasl screw threaded engagement therewith. 'F he burner nozzle29 is shown connected `directly to the nipple 24. However, it is my intention to also use this devieein connection with manifolds,` and in such instances the manifold is connected directly'to the nipple 24,. and the burner nozzlewould then be connected to the'manitold anda plurality of burners could be employedinstead of a single burner.

The, upper end of the upper section 11 is provided with a plurality of openings 81 for admitting air from the atmosphere to the mixingchamber and above the diaphragm 14. The amountof" air that is admitted to the mixing chamber being controlled by a disk shaped valve 32H. This valve is provided with-.av central opening 33 which surrounds the tubular extension 26 and a suiicient space is aiiforded between the extension 26 and the walls of the opening 33 to permitair to pass therethrough to the openings 31 in section 11.

r111e disk valve32 *is lpro-,vided with an annular flange 34`which .has screwthreaded Eengagement with the exterior wall of the upper section 11 whereby the amount of air admitted to the mixing chamber may be regulated by adjusting the valve on the upper section 11. The valve is held in adjusted po-. sition by means of a set screw or nut 35.

In Figures 4 and 5 the diaphragm 14 is provided with a central opening 15 and is similar in construction to the diaphragm shown in Figures 2 .3, but the oloWlrf size of the openings and only a proportional amount vot gas will pass through a certain size orifice at a proportional pressure of compressed air.

ln the operation of this device the gas is admitted to the mixing chamber through pipes 23 and compressed air through the nozzle 19, beneath the diaphragm 14. The gas and compressed air are brought together beneath the diaphragm, the compressed air drawing the gas therewith through the central opening of the diaphragm causing a thorough mixture ot the gas with the compressed air and delivering it to the nipple 24 and burner nozzle 29. After the gas has been ignited at the nozzle the disk valve 32 will be adjusted'upon the mixing chamber for governing the amount-of atmospheric air admitted to the chamber and drawn thereinto by the blast et compressed air and gas passing through the chamber and into the nipple 24 for' governing the intensity of the heat of the flame.

The adjustment of the nozzle 19 with respect to the diaphragm 14 governs the delivery or suction on the gas delivered through the diaphragm andthe adjustment of the nipple 24 within the mixing chamber regulates the Vdirect discharge of compressed air and gas into the nipple.

l. In a gas mixer the combination of a mixing chamber, a perfor-ate diaphragm therein, means for delivering gas and ycompressed air to the mixing chamber on one side ot the diaphragm and discharging the gas and compressed air through the diaphragm, and a burner nozzle connected on the opposite side of the diaphragm to which thecompressed air and gas are delivered and adjustable with respect to the opening in the diaphragm.

2. In a gas mixerthe combination of a mixing chamber having adiaphragm therein said diaphragm provided with a central opening, means for delivering gas to the mixing chamber on one side of the diaphragm, and a compressed air nozzle adjustably connected to the mixing chamber and adjustable to and from the opening in the diaphragm for delivering Compressed air to the mixing chamber and through the opening in the diaphragm for drawing the gas therethrough, and a burner nozzle connected to the mixing chamber ron the opposite sid-e of the diaphragm.

3.*In a gas mixer the combination of afmixing chamber made in sections, a perforate diaphragm interposed between the two sections, means for connecting the two sections together and supporting the diaphragm, means for delivering compressed air and gas to the mixing chamber on one side ot the diaphragm, a burner nozzle connected to the mixing chamber on the opposite side, said mixing chamber having openings therein for admitting air to the mixing chamber on the opposite side of the diaphragm, and a valve for controlling the admission of air through said openings.

4. In a gas mixer the combination of a mixing chamber having a reversible diaphragm therein provided with a central opening, said diaphragm having the central portion thereof extending laterally therefrom in the form of a truncated cone, means fordelivering gas to the mixing chamber beneath the diaphragm, a compressed air nozzle for delivering compressed .air to the mixing chamber beneath the diaphragm and adjustable with respect to the opening in the diaphragm, and a burner nozzle connected tothe mixing chamber on the opposite side of the diaphragm.

5. In a gas mixer, the combination of a mixing chamber, .a perforate diaphragm therein, means for delivering gas to the mixing chamber on one side of the diaphragm, a compressed air nozzle connected to the mixing chamber and adjustable to and from the opening in the diaphragm for governing the delivery of the gas throughv the diaphragm by the compressed air, and a burner nozzle connected to the mixing chamber on the opposite side of the diaphragm and .adjustable to and from the diaphragm with respect to the opening in the diaphragm. Y

FRANK. W. GAULT, JR. 

